It mostly helped out with the construction of skyscrapers, Boats, etc.
Answer:
I think a or d I'm not sure
Answer:
-increasing American production necessitated the acquisition of additional markets.
-a worldwide scramble for empire, not including the United States, might eliminate American opportunities for growth as well as threaten its defenses.
-The end of the frontier in America raised fears about diminishing opportunities at home.
-it was America's duty and destiny to extend its "superior" government and culture to less privileged and capable peoples.
Explanation:
